This book can easily be used as a college textbook on Oracle RAC. I am studying for the Oracle Certified Master exam and this is possibly the most high level book on Oracle I have read.
It has 3 major strengths which I found to be superior to any Oracle RAC books I have read (including the manual from Oracle).
2)Comprehensive Overview and instructions
3)Quality of writing
The authors write about Linux and Oracle and are high level experts in the subjects. For example, the authors have a very detailed description of how Oracle Cache Fusion handles locking across all the nodes in a RAC environment (probably the crown jewel of RAC technology). They also discuss, in detail, different types of CPU, memory, and storage and contains detailed description of each architecture. Lastly, it contains vast number of "how to" install, configure, change, analyze, backup/restore, and utilize Oracle RAC and Linux.
2)Comprehensive Coverage and Instructions
No small amount of detail has been skipped. The book contains every utility (there are many) provided by Oracle to implement RAC. It provides a good step-by-step coverage of Linux and Oracle RAC installation as well what each step is adding to the RAC environment. To top it off, it adds how to performance tune, administer, troubleshoot, backup/restore, and use Dataguard in a RAC environment. I can't think of a subject on RAC which the authors did not cover.
3)Quality of Writing
I was pleasantly surprised how well written this book is. Although far from a Pulitzer Prize material, it certainly belongs in that category amongst the Oracle books. Every praragraph has been well organized and written. The proofreader of this book deserves major praise for their work.